When people ask why PHP doesn’t have this or that cool feature which allows to do some tricky mind-bending function and requires a dozen pages of manual to describe it, I find this quote from Brian W. Kernighan is very appropriate:
Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.
Corollary of that is that some clever tricks are better left not done and some cool things may not look that cool when you have to deal with the consequences.
That being said, I think there are many cool things yet to be done in PHP. So, I’ve posted a poll on Programmers.StackExchange site about what people want to see in PHP. I know people regularly post on PHP lists about that, etc. but I think SE crowd would be somewhat different from what is found on PHP internal lists, so it would be interesting to see what people’s wishlists for PHP are.
If you happen to want to add your 2c there or just vote on stuff – feel welcome. Absolutely no promises it would have any weight, influence anything (except maybe my own opinion about what people want in PHP), etc. of course.